some fix and file upload

frontend/modules/api/controllers/FileController.php

@@ -0,0 +1,58 @@
+<?php
+
+namespace frontend\modules\api\controllers;
+
+use common\classes\Debug;
+use common\models\File;
+use yii\helpers\FileHelper;
+use yii\web\ServerErrorHttpException;
+use yii\web\UploadedFile;
+
+class FileController extends ApiController
+{
+    public function verbs(): array
+    {
+        return [
+            'upload' => ['post'],
+        ];
+    }
+
+    public function actionUpload()
+    {
+        $uploads = UploadedFile::getInstancesByName("uploadFile");
+        if (empty($uploads)) {
+            throw new ServerErrorHttpException("Must upload at least 1 file in uploadFile form-data POST");
+        }
+
+        $savedFiles = [];
+        foreach ($uploads as $file) {
+            $md5 = md5($file->baseName);
+            $path = \Yii::getAlias("@frontend/web/files/") . $md5[0] . $md5[1] . "/" . $md5[2] . $md5[3] . "/";
+            if (!file_exists($path)) {
+                FileHelper::createDirectory($path);
+            }
+
+            $path .= $md5 . '.' . $file->getExtension();
+            $file->saveAs($path);
+
+            if (!$file->hasError) {
+                $fileModel = new File();
+                $fileModel->name = $file->name;
+                $fileModel->path = $path;
+                $fileModel->url = "/files/". $md5[0] . $md5[1] . "/" . $md5[2] . $md5[3] . "/" . $md5 . '.' . $file->getExtension();
+                $fileModel->type = $file->getExtension();
+                $fileModel->{'mime-type'} = $file->type;
+
+                if (!$fileModel->validate()){
+                    throw new ServerErrorHttpException(json_encode($fileModel->errors));
+                }
+
+                $fileModel->save();
+                $savedFiles[] = $fileModel;
+            }
+        }
+
+        return $savedFiles;
+    }
+
+}